We know that the majority of the world is anti-Semitic, Chaim. Look at the outpouring of sympathy for the butcher John Demjanjuk (ysv) last week at his death, for instance. Maybe that's all there is to this.
I agree with the first part of what you expressed. But I don't think that's the main reason why this video has so many dislikes. The reason being, JTF has well over 1000 videos on ZooTube. The vast majority of them don't have close to 1203 dislikes. My guess is one or more individuals who know about JTF, and for whatever reason ( s ) are against JTF, made a concerted effort to target this particular video.